---
id: CVE-2026-104459
title: >-
  YesWiki before 4.6.7 contains a server-side request forgery vulnerability in
  WebfingerService that allows unauthenticated attackers to trigger HTTPS
  requests to internal hosts
summary: >-
  YesWiki before 4.6.7 contains a server-side request forgery vulnerability in
  WebfingerService that allows unauthenticated attackers to trigger HTTPS
  requests to internal hosts. Attackers can POST a crafted actor_handle with a
  numeric hos…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'
cwe:
  - CWE-918
vendor: YesWiki
product: yeswiki
affected:
  - yeswiki < 4.6.7
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T14:17:08.793'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104459'
references:
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-x4mq-qxvc-g82j'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-ssrf-via-activitypub-webfinger-actor-handle
    label: disclosure@vulncheck.com
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-x4mq-qxvc-g82j'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-02T13:35:47.304335Z'
ingestedAt: '2026-10-02T12:17:44.342Z'
---

## Overview

YesWiki before 4.6.7 contains a server-side request forgery vulnerability in WebfingerService that allows unauthenticated attackers to trigger HTTPS requests to internal hosts. Attackers can POST a crafted actor_handle with a numeric host and port to the abonnements view to probe internal HTTPS services and ports.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.